systool

View system device information by bus, and classes.

List all attributes of devices of a bus (eg. pci, usb). View all buses using ls /sys/bus

$ systool -b [bus] -v

List all attributes of a class of devices (eg. drm, block). View all classes using ls /sys/class

$ systool -c [class] -v

Show only device drivers of a bus (eg. pci, usb)

$ systool -b [bus] -D